RS PRO Non-Fused Terminal Block, 3-Way, 32A, 12 AWG Wire, Screw Down Termination

Steatite body with nickel-plated brass inserts and plated steel screws. Suitable for use in high ambient temperatures.

Temperature rating 300°C

The temperature rating quoted for the rectangular types is with respect to the brass inserts. The Steatite material itself will withstand 500°C.